1. Use the following command to get a list of all the queues using the CF structures to be deleted:

   DISPLAY QUEUE(*) QSGDISP(SHARED) CFSTRUCT(structure-name)

2. Delete all the queues that use the structure.
3. Stop and restart each queue manager in the queue-sharing group in turn to disconnect WebSphere® MQ and DB2® from the structure and delete information about it. All the queue managers do not need to be stopped at once; just one at a time.

See WebSphere MQ for z/OS® System Administration Guide and WebSphere MQ for z/OS System Setup Guide for more information.